diff --git a/bin/generate-oauth2-keys.php b/bin/generate-oauth2-keys.php
new file mode 100644
index 0000000..1d7636a
--- /dev/null
+++ b/bin/generate-oauth2-keys.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+$files = [
+    './data/oauth/encryption.key',
+    './data/oauth/private.key',
+    './data/oauth/public.key',
+];
+
+foreach ($files as $file) {
+    if (! file_exists($file)) {
+        return include './vendor/mezzio/mezzio-authentication-oauth2/bin/generate-oauth2-keys';
+    }
+}
+
+echo 'OAuth2 keys already exist. Skipping...' . PHP_EOL;
+return 0;
diff --git a/composer.json b/composer.json
index 2696af2..90aeafc 100644
--- a/composer.json
+++ b/composer.json
@@ -126,7 +126,7 @@
         "development-enable": "laminas-development-mode enable",
         "development-status": "laminas-development-mode status",
         "post-update-cmd": [
-            "php ./vendor/bin/generate-oauth2-keys",
+            "php ./bin/generate-oauth2-keys.php",
             "php ./bin/composer-post-install-script.php"
         ],
         "serve": "php -S 0.0.0.0:8080 -t public/",